infrared astronomy noun

The study of radiation from celestial bodies, such as nascent stars, in the infrared wavelength range

infrared photography noun

Photography using film specially sensitized to infrared radiation, with applications in conditions without visible light, camouflage and forgery detection, and aerial surveys

infrared radiation noun

Electromagnetic radiation between the visible and microwave regions of the spectrum, ie with wavelengths from 0.75 to 1000 micrometres